Query using Group By, Top N and Sum - sql

Question

I have looked through the forum and can find a variety of examples to solve my problem but just cannot put everything together.
My situation is typical that I would like to show the Top 10 customers (Orders.[Customer Name]) by group (Shop_Lookup.ShopGroup]) for their total revenue.
I can get so far in producing the overall Top 10 regardless of ShopGroup but just cannot get my head around getting the Sub Query to work. My current code is -
SELECT TOP 10 Orders.[Customer Name],
Sum(Orders.[Actual Revenue]) AS [SumOfActual Revenue],
Orders.[This Month],
Shop_Lookup.[ShopGroup]
FROM Orders
INNER JOIN Shop_Lookup ON Orders.[ShopID] = ShopLookup.[ShopID]
WHERE ((Orders.[This Month])="current")
GROUP BY Orders.[Customer Name], Orders.[This Month], Shop_Lookup.[ShopGroup]
ORDER BY Sum(Orders.[Actual Revenue]) DESC;

Answer 1

Completely AIR CODED ! Proceed with caution.
You can use Sub Query to get this !
SELECT
Orders.[Customer Name],
Sum(Orders.[Actual Revenue]) AS [SumOfActual Revenue],
Orders.[This Month],
Shop_Lookup.[ShopGroup]
FROM
Orders
INNER JOIN
Shop_Lookup
ON
Orders.[ShopID] = ShopLookup.[ShopID]
WHERE
(
(Orders.[This Month] = 'Current')
AND
(Orders.ShopID IN
(SELECT
TOP 10 ShopID
FROM
Orders AS Dupe
WHERE
Dupe.ShopID = Orders.ShopID
)
)
)
GROUP BY
Orders.[Customer Name],
Orders.[This Month],
Shop_Lookup.[ShopGroup]
ORDER BY
Sum(Orders.[Actual Revenue]) DESC;
More information on Subqueries : http://allenbrowne.com/subquery-01.html